CN208010412U - The bypath system of double reheat Turbo-generator Set - Google Patents
The bypath system of double reheat Turbo-generator Set Download PDFInfo
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- CN208010412U CN208010412U CN201721817368.2U CN201721817368U CN208010412U CN 208010412 U CN208010412 U CN 208010412U CN 201721817368 U CN201721817368 U CN 201721817368U CN 208010412 U CN208010412 U CN 208010412U
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Abstract
The utility model discloses a kind of bypath systems applied to double reheat Turbo-generator Set, and for existing double reheat bypath system pipeline complexity, cost is higher, controls complicated problem, has invented a kind of succinct bypath system.The system includes extra high pressure steam bypass conduit and high steam bypass conduit, the super-pressure bypass conduit is drawn from the pipeline before ultra-high pressure cylinder main inlet throttle-stop valve, the gland steam exhauster for introducing ultra-high pressure cylinder, makes the extra high pressure steam from boiler partly or entirely be discharged into single reheat device；The high pressure turbine by pipeline is drawn from the pipeline before high pressure cylinder gate, introduces condenser, the high steam from single reheat device is made partly or entirely to be discharged into condenser.The system simplifies structure, reduces the manufacturing cost and operating cost of unit under the premise of meeting bypass basic function and performance.
Description
Technical field
The utility model is related to the bypath system of Turbo-generator Set, specifically a kind of double reheat Turbo-generator Set
Bypath system.
Background technology
Turbo-generator Set is needed through bypath system in special operation conditions such as startup, shutdown, removal of loads by vapor portion
Or all lay down, to maintain system thermodynamic equilibrium, ensure unit safety.
Currently, once reheating, two class type of double reheat, their bypath system structure are poor for powerful fired power generating unit
Different very big, the bypath system of single reheat unit is fairly simple, only level-one bypass conduit, and bypass duct one end is from steam turbine high pressure
It is picked out on pipeline before main inlet throttle-stop valve, the other end accesses condenser, and the high steam from boiler is directly unloaded toward condenser.By this
The function of road system is to improve unit starting performance：Main vapour pressure can be controlled in unit starting, with adapt to unit level pressure or
The requirement of sliding pressure operation is shortened and starts the time；Recovered steam avoids medium-loss；In load rejection, boiler also can guarantee
In hot stand-by duty, quickly to open machine.
The bypath system of double reheat power generation sets is then more complicated, shares three-level, as shown in Figure 1 and Figure 2, first order bypass
System is to unload extra high pressure steam toward single reheat device, and second level bypath system is to unload the high steam after single reheat toward two
Secondary reheater, third level bypath system are to unload the middle pressure steam after double reheat toward condenser.The original intention of this structure design,
It is in order to protect first and second reheater, because in the unit starting stage, if as single reheat unit, only setting by level-one
Road, steam directly unload past condenser, will not have working medium in reheater, dry combustion method situation occur, it is dry that three-level bypass can avoid reheater
It burns.But the disadvantage is that bypass series is more, shunt valve Taoist priest is complicated, installation trouble, and Steam Parameters For Extra-supercritical Units
Height, tubing material require very high, price, complicated bypath system to keep power plant's initial investment big, and maintenance cost is high.
However, with the progress of material technology, boiler reheater has used more excellent heat resisting steel, the temperature allowable of material
The fire box temperature at position where degree is far above reheater, although the steam parameter of double reheat power generation sets is than single reheat unit
Height, fire box temperature is also higher than the fire box temperature of single reheat unit, but still within the allowable temperature of reheater material, reheating
Device can still bear dry combustion method.That is, after material update, it is limited to traditional concept, double reheat power generation sets is still designed as three
Grade bypath system is excessively complicated, it is not necessary that, it can simplify.
Double reheat Turbo-generator Set it is efficient, the U.S. has just put into operation the first in the world platform ultra supercritical early in nineteen fifty-seven
Double reheat fired power generating unit, but because of double reheat power generation sets system complex, involve great expense, and the cost of fuel was cheaper at that time,
Power plant is still willing to that single reheat unit, double reheat fired power generating unit is selected not to be promoted rapidly.With the rising of fuel price, state
Exhaust gas discharge limitation is increasingly stringenter on border, and double reheat power generation sets have returned to the visual field of people again, becomes current main
Type is widely used.How to simplify the structure of double reheat power generation sets, reduce manufacture, operating cost, is that the unit promotes and applies
Problem to be solved.
Invention content
The purpose of this utility model is that the redundant configuration of the bypath system of Double reheat steam turbine system is reduced, with letter
Change ultra supercritical double reheat power generation sets structure, reduces manufacture, operating cost, a kind of side applied to Double reheat steam turbine is provided
Road system.
The technical solution of the utility model is：
A kind of bypath system of double reheat Turbo-generator Set, which is characterized in that the system includes super-pressure shunt valve
Road（Extra high pressure steam bypass conduit）With high pressure turbine by pipeline（High steam bypass conduit）, the super-pressure bypass conduit is from super
Drawn on pipeline before high pressure cylinder main inlet throttle-stop valve, introduce the gland steam exhauster of ultra-high pressure cylinder, make extra high pressure steam part from boiler or
All it is discharged into single reheat device；The high pressure turbine by pipeline is drawn from the pipeline before high pressure cylinder gate, introduces condenser, makes to come
It is partly or entirely discharged into condenser from the high steam of single reheat device.
Steam flow control valve is equipped in the super-pressure bypass conduit.
Further, pressure reducing valve, cooling valve and water spray isolating valve are additionally provided in the super-pressure bypass conduit.
Steam flow control valve is equipped in the high pressure turbine by pipeline.
Further, pressure reducing valve, desuperheat valve and water spray isolating valve are additionally provided in the high pressure turbine by pipeline.
The capacity of the super-pressure bypass conduit is 30%~100%BMCR, and the capacity of high pressure turbine by pipeline is 30%~100%
BMCR。
The double reheat Turbo-generator Set includes ultra-high pressure cylinder, high pressure cylinder, intermediate pressure cylinder, low pressure (LP) cylinder and condenser,
In, high pressure cylinder, intermediate pressure cylinder is cylinder combined structures or divide cylinder structure.
The beneficial effects of the utility model：
Under the premise of keeping bypath system basic function and performance, redundant configuration is reduced, bypath system is simplified
Structure, to reduce the manufacturing cost and operating cost of double reheat power generation sets.
Description of the drawings
Fig. 1 is the bypath system figure of high, the middle pressure combined cylinder turbine of existing double reheat
Fig. 2 is the bypath system figure that existing double reheat is high, middle pressure divides cylinder unit
Fig. 3 is the bypath system figure of high, the middle pressure combined cylinder turbine of the utility model double reheat
Fig. 4 is the bypath system figure that the utility model double reheat is high, middle pressure divides cylinder unit
Code name meaning in figure：1-ultra-high pressure cylinder, 2-high pressure cylinders, 3-intermediate pressure cylinders, 4-low pressure (LP) cylinders, 5-generators, 6-
Condenser, 7-boilers, 8-steam flow control valves（Super-pressure bypass valve）, 9-super-pressure bypass conduits, 10-steam flows
Regulating valve（High pressure bypass valve）, 11-high pressure turbine by pipelines.
Specific implementation mode
Embodiment one
Referring to Fig. 3：It is the bypath system figure of high, the middle pressure combined cylinder turbine of the utility model double reheat, unit includes superelevation
Cylinder pressure 1, high pressure cylinder 2, intermediate pressure cylinder 3, low pressure (LP) cylinder 4, generator 5, condenser 6, boiler 7.Wherein, high pressure cylinder 2, intermediate pressure cylinder 3 are to close
Cylinder structure.
The bypath system of the unit is total to two-stage, and first order super-pressure bypath system pipeline 9 is before 1 main inlet throttle-stop valve of ultra-high pressure cylinder
It is drawn on pipeline, introduces the gland steam exhauster of ultra-high pressure cylinder 1, which is equipped with steam flow control valve 8, is steamed for adjusting bypass
Steam flow amount makes the extra high pressure steam from boiler partly or entirely be discharged into the single reheat device of boiler 7；It is additionally provided on the pipeline 9
Pressure reducing valve, cooling valve, water spray isolating valve（It is not shown in figure）, with mitigate super-pressure reject steam to the temperature of single reheat device,
Compression shock.
Second level hp by-pass system pipeline 11 is drawn from the pipeline before 2 porthole of high pressure cylinder, introduces condenser 6, the pipe
Road 11 is equipped with steam flow control valve 10 makes the high steam portion from single reheat device for adjusting reject steam flow
Divide or be all discharged into condenser 6, pressure reducing valve, cooling valve, water spray isolating valve are additionally provided on the pipeline 11（It is not shown in figure）, to subtract
Temperature of the light high pressure turbine by steam to condenser 6, compression shock.
The capacity of super-pressure bypass conduit is 30%~100%BMCR, and the capacity of high pressure turbine by pipeline is 30%~100%
BMCR。
Embodiment two
Referring to Fig. 4：It is the bypath system figure that the utility model double reheat is high, middle pressure divides cylinder unit, unit includes superelevation
Cylinder pressure 1, high pressure cylinder 2, intermediate pressure cylinder 3, low pressure (LP) cylinder 4, generator 5, condenser 6, boiler 7.Wherein, high pressure cylinder 2, intermediate pressure cylinder 3 are point
Cylinder structure.
The bypath system of the unit is total to two-stage, and first order super-pressure bypath system pipeline 9 is before 1 main inlet throttle-stop valve of ultra-high pressure cylinder
It is drawn on pipeline, introduces the gland steam exhauster of ultra-high pressure cylinder 1, which is equipped with steam flow control valve 8, is steamed for adjusting bypass
Steam flow amount makes the extra high pressure steam from boiler partly or entirely be discharged into the single reheat device of boiler 7；It is additionally provided on the pipeline 9
Pressure reducing valve, cooling valve, water spray isolating valve（It is not shown in figure）, with mitigate super-pressure reject steam to the temperature of single reheat device,
Compression shock.
Second level hp by-pass system pipeline 11 is drawn from the pipeline before 2 porthole of high pressure cylinder, introduces condenser 6, the pipe
Road 11 is equipped with steam flow control valve 10 makes the high steam portion from single reheat device for adjusting reject steam flow
Divide or be all discharged into condenser 6, pressure reducing valve, cooling valve, water spray isolating valve are additionally provided on the pipeline 11（It is not shown in figure）, to subtract
Temperature of the light high pressure turbine by steam to condenser 6, compression shock.
The capacity of super-pressure bypass conduit is 30%~100%BMCR, and the capacity of high pressure turbine by pipeline is 30%~100%
BMCR。
Claims (7)
1. a kind of bypath system of double reheat Turbo-generator Set, which is characterized in that the system includes super-pressure bypass conduit
With high pressure turbine by pipeline, the super-pressure bypass conduit is drawn from the pipeline before ultra-high pressure cylinder main inlet throttle-stop valve, introduces ultra-high pressure cylinder
Gland steam exhauster, the high pressure turbine by pipeline draws from the pipeline before high pressure cylinder gate, introduces condenser.
2. the bypath system of double reheat Turbo-generator Set as described in claim 1, which is characterized in that by the super-pressure
Steam flow control valve is equipped in the pipeline of road.
3. the bypath system of double reheat Turbo-generator Set as claimed in claim 2, which is characterized in that by the super-pressure
Pressure reducing valve, cooling valve and water spray isolating valve are additionally provided in the pipeline of road.
4. the bypath system of double reheat Turbo-generator Set as described in claim 1, which is characterized in that the high pressure turbine by
Steam flow control valve is equipped in pipeline.
5. the bypath system of double reheat Turbo-generator Set as claimed in claim 4, which is characterized in that the high pressure turbine by
Pressure reducing valve, desuperheat valve and water spray isolating valve are additionally provided in pipeline.
6. the bypath system of double reheat Turbo-generator Set as described in claim 1, which is characterized in that by the super-pressure
The capacity of road pipeline is 30%~100%BMCR, and the capacity of high pressure turbine by pipeline is 30%~100%BMCR.
7. the bypath system of double reheat Turbo-generator Set as described in claim 1, which is characterized in that the double reheat
Turbo-generator Set includes ultra-high pressure cylinder, high pressure cylinder, intermediate pressure cylinder, low pressure (LP) cylinder and condenser, wherein high pressure cylinder, intermediate pressure cylinder are to close
Cylinder structure divides cylinder structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721817368.2U CN208010412U (en) | 2017-12-22 | 2017-12-22 | The bypath system of double reheat Turbo-generator Set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721817368.2U CN208010412U (en) | 2017-12-22 | 2017-12-22 | The bypath system of double reheat Turbo-generator Set |
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| CN208010412U true CN208010412U (en) | 2018-10-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109630221A (en) * | 2018-11-30 | 2019-04-16 | 东方电气集团东方汽轮机有限公司 | A kind of double reheat power generation sets system and method suitable for depth peak regulation |
| CN114991894A (en) * | 2022-04-27 | 2022-09-02 | 东方电气集团东方汽轮机有限公司 | Turbine system with high load rate at full operation section of limited volume working medium and operation method |
-
2017
- 2017-12-22 CN CN201721817368.2U patent/CN208010412U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109630221A (en) * | 2018-11-30 | 2019-04-16 | 东方电气集团东方汽轮机有限公司 | A kind of double reheat power generation sets system and method suitable for depth peak regulation |
| CN114991894A (en) * | 2022-04-27 | 2022-09-02 | 东方电气集团东方汽轮机有限公司 | Turbine system with high load rate at full operation section of limited volume working medium and operation method |
| CN114991894B (en) * | 2022-04-27 | 2023-07-04 | 东方电气集团东方汽轮机有限公司 | Turbine system with limited volume working medium full-operation section and high load rate and operation method |
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